diff --git a/ruby/README.md b/ruby/README.md
index 3818b914330..c5902a3039b 100644
--- a/ruby/README.md
+++ b/ruby/README.md
@@ -1,6 +1,10 @@
 gRPC in 3 minutes (Ruby)
 ========================
 
+BACKGROUND
+-------------
+For this sample, we've already generated the server and client stubs from [helloworld.proto](https://github.com/grpc/grpc-common/blob/master/protos/helloworld.proto). 
+
 PREREQUISITES
 -------------